Karin Alvarenga Hd Nielsen, M.D.
Pediatric Infectious Diseases Physician · Los Angeles, CA
Karin Alvarenga Hd Nielsen, M.D. is a pediatric infectious diseases physician with a practice address in Los Angeles, California, and NPI 1194832469, issued on Aug 24, 2006. Check the license (California A64837, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karin Alvarenga Hd Nielsen
- Credential
- M.D.
- Primary taxonomy
- Pediatric Infectious Diseases Physician 2080P0208X
- License number
- A64837 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10833 LE Conte Ave, Los Angeles, CA 90095
- Phone
- (310) 206-3952
- Enumerated
- Aug 24, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (310) 206-0209
- Medicaid IDs
- GR0053510 CA
00A648370 CA - Medicare enrollment
- Enrolled (PECOS I20040409000265); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatric infectious diseases physician records → All 161 in California → Look up another NPI →
Also registered at 10833 LE Conte Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Karin Alvarenga Hd Nielsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A64837Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average pediatric infectious diseases physician in 2024
89 Medicare Part D claims, against an average of 165 among the 111 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Tivicay16 claims
- Enalapril Maleate12 claims
- Lamivudine-Zidovudine12 claims
- Propranolol Hcl12 claims
- Drospirenone-Ethinyl Estradiol11 claims
- Metformin Hcl Er11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 80.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $34.09
1 payment: food and beverage; the largest payer was ViiV Healthcare Company. The 294 providers of this specialty with any payment received $9,151.53 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- UC RegentsLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karin Alvarenga Hd Nielsen among 161 pediatric infectious diseases physician records in California
Karin Alvarenga Hd Nielsen, M.D. is one of 161 pediatric infectious diseases physician records with a practice address in California. 48% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 57% newer
- In a Medicare fileYes · 48% of these records are
- In the CMS Doctors and Clinicians fileYes · 30% of these records are
- Graduated1986 · median 2002 among the 49 with a school on file
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0208X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Infectious Diseases Physician providers in California
There are 161 pediatric infectious diseases physician records in California.
All 161 in California → Every provider in Los Angeles → Pediatric Infectious Diseases Physician nationwide →
The 8 pediatric infectious diseases physician records with the nearest ZIP codes
- Kristina Adachi, MDLos Angeles, CA 900951366603144
- Yvonne Bryson, M.D.Los Angeles, CA 900951417903949
- James Cherry, M.D.Los Angeles, CA 900951710907605
- Annabelle De St. Maurice, M.D.Los Angeles, CA 900951083927552
- Jaime Deville, M.D.Los Angeles, CA 900951750301503
- Paul Krogstad, M.D.Los Angeles, CA 900951518074244
- Jennifer Rathe, M.D.Los Angeles, CA 900951770841108
- Linette Sande Lopez, MDLos Angeles, CA 900951356590608
Common questions
What is Karin Alvarenga Hd Nielsen, M.D.'s NPI number?
Karin Alvarenga Hd Nielsen, M.D.'s National Provider Identifier (NPI) is 1194832469, issued on Aug 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karin Alvarenga Hd Nielsen, M.D. located?
The NPPES record lists a practice address at 10833 LE Conte Ave, Los Angeles, CA, 90095. Phone: (310) 206-3952. Providers update this record themselves, so call before visiting.
How can I verify Karin Alvarenga Hd Nielsen, M.D.'s license?
NPPES lists California license number A64837, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Karin Alvarenga Hd Nielsen, M.D. prescribe under Medicare Part D?
In 2024, Karin Alvarenga Hd Nielsen, M.D. had 89 Medicare Part D claims; the average among pediatric infectious diseases physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Karin Alvarenga Hd Nielsen, M.D.'s MIPS final score?
The 2023 MIPS final score is 80.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.